| 1 | /* The clone3 kernel interface definitions. |
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| 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _CLONE3_H |
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| 20 | #define _CLONE3_H 1 |
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| 21 | |
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| 22 | #include <features.h> |
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| 23 | #include <stddef.h> |
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| 24 | #include <bits/types.h> |
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| 25 | |
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| 26 | |
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| 27 | /* Flags for the clone3 syscall. */ |
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| 28 | #define CLONE_CLEAR_SIGHAND 0x100000000ULL /* Clear any signal handler and |
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| 29 | reset to SIG_DFL. */ |
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| 30 | #define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given |
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| 31 | the right permissions. */ |
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| 32 | |
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| 33 | /* The unsigned 64-bit and 8-byte aligned integer type. */ |
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| 34 | typedef __U64_TYPE __aligned_uint64_t __attribute__ ((__aligned__ (8))); |
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| 35 | |
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| 36 | /* This struct should only be used in an argument to the clone3 system |
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| 37 | call (along with its size argument). It may be extended with new |
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| 38 | fields in the future. */ |
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| 39 | |
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| 40 | struct clone_args |
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| 41 | { |
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| 42 | /* Flags bit mask. */ |
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| 43 | __aligned_uint64_t flags; |
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| 44 | /* Where to store PID file descriptor (pid_t *). */ |
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| 45 | __aligned_uint64_t pidfd; |
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| 46 | /* Where to store child TID, in child's memory (pid_t *). */ |
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| 47 | __aligned_uint64_t child_tid; |
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| 48 | /* Where to store child TID, in parent's memory (int *). */ |
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| 49 | __aligned_uint64_t parent_tid; |
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| 50 | /* Signal to deliver to parent on child termination */ |
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| 51 | __aligned_uint64_t exit_signal; |
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| 52 | /* The lowest address of stack. */ |
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| 53 | __aligned_uint64_t stack; |
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| 54 | /* Size of stack. */ |
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| 55 | __aligned_uint64_t stack_size; |
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| 56 | /* Location of new TLS. */ |
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| 57 | __aligned_uint64_t tls; |
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| 58 | /* Pointer to a pid_t array (since Linux 5.5). */ |
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| 59 | __aligned_uint64_t set_tid; |
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| 60 | /* Number of elements in set_tid (since Linux 5.5). */ |
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| 61 | __aligned_uint64_t set_tid_size; |
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| 62 | /* File descriptor for target cgroup of child (since Linux 5.7). */ |
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| 63 | __aligned_uint64_t cgroup; |
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| 64 | }; |
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| 65 | |
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| 66 | #endif /* clone3.h */ |
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| 67 | |
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